Abstract
The corrosion inhibition effect and mechanism of the amino acid ionic liquids—1-butyl-3-methylimidazolium Lysine ([BMIm][Lys]) for carbon steel in 5% H2SO4solution are investigated by electrochemical tests. The results indicate that the [BMIm][Lys] has a good inhibition performance for the carbon steel in 5% H2SO4solution. The corrosion inhibition efficiency improves with the increase of the concentration, which arrives at 95% ultimately. The study also shows that the inhibitors are mixed-type ones. The adsorption of the inhibitor molecules on the carbon steel surface obeys Langmuir adsorption isotherm.
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